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refactor: 架构升级

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# form
## Instructions
表单，将组件内的用户输入的 <switch> <input> <checkbox> <slider> <radio> <picker> 提交。
当点击 <form> 表单中 formType 为 submit 的 <button> 组件时，会将表单组件中的 value 值进行提交，需要在表单组件中加上 name 来作为 key。
属性说明
### Syntax
- 使用 `<form />`（或 `<form></form>`，当需要包裹子节点时）。
- 遇到平台差异时，建议使用条件编译（`#ifdef / #endif`）显式处理。
#### Properties
| 属性名 | 类型 | 说明 | 平台差异说明 |
| --- | --- | --- | --- |
| report-submit | Boolean | 是否返回 formId 用于发送 模板消息 | 微信小程序、支付宝小程序 |
| report-submit-timeout | number | 等待一段时间（毫秒数）以确认 formId 是否生效。如果未指定这个参数，formId 有很小的概率是无效的（如遇到网络失败的情况）。指定这个参数将可以检测 formId 是否有效，以这个参数的时间作为这项检测的超时时间。如果失败，将返回 requestFormId:fail 开头的 formId | 微信小程序2.6.2 |
#### Events
| 事件名 | 类型 | 说明 | 平台差异说明 |
| --- | --- | --- | --- |
| @submit | EventHandle | 携带 form 中的数据触发 submit 事件，event.detail = {value : {'name': 'value'} , formId: ''}，report-submit 为 true 时才会返回 formId | |
| @reset | EventHandle | 表单重置时会触发 reset 事件 | |
#### Platform Compatibility
See official docs for platform support table: `https://doc.dcloud.net.cn/uni-app-x/component/form.html`
### Examples
### Example (Example 1)
```vue
<!-- 本示例未包含完整css，获取外链css请参考上文，在hello uni-app项目中查看 -->
<template>
<view>
<view>
<form @submit="formSubmit" @reset="formReset">
<view class="uni-form-item uni-column">
<view class="title">switch</view>
<view>
<switch name="switch" />
</view>
</view>
<view class="uni-form-item uni-column">
<view class="title">radio</view>
<radio-group name="radio">
<label>
<radio value="radio1" /><text>选项一</text>
</label>
<label>
<radio value="radio2" /><text>选项二</text>
</label>
</radio-group>
</view>
<view class="uni-form-item uni-column">
<view class="title">checkbox</view>
<checkbox-group name="checkbox">
<label>
<checkbox value="checkbox1" /><text>选项一</text>
</label>
<label>
<checkbox value="checkbox2" /><text>选项二</text>
</label>
</checkbox-group>
</view>
<view class="uni-form-item uni-column">
<view class="title">slider</view>
<slider value="50" name="slider" show-value></slider>
</view>
<view class="uni-form-item uni-column">
<view class="title">input</view>
<input class="uni-input" name="input" placeholder="这是一个输入框" />
</view>
<view class="uni-btn-v">
<button form-type="submit">Submit</button>
<button type="default" form-type="reset">Reset</button>
</view>
</form>
</view>
</view>
</template>
```
### Example (Example 2)
```vue
<!-- 本示例未包含完整css，获取外链css请参考上文，在hello uni-app项目中查看 -->
<template>
<view>
<view>
<form @submit="formSubmit" @reset="formReset">
<view class="uni-form-item uni-column">
<view class="title">switch</view>
<view>
<switch name="switch" />
</view>
</view>
<view class="uni-form-item uni-column">
<view class="title">radio</view>
<radio-group name="radio">
<label>
<radio value="radio1" /><text>选项一</text>
</label>
<label>
<radio value="radio2" /><text>选项二</text>
</label>
</radio-group>
</view>
<view class="uni-form-item uni-column">
<view class="title">checkbox</view>
<checkbox-group name="checkbox">
<label>
<checkbox value="checkbox1" /><text>选项一</text>
</label>
<label>
<checkbox value="checkbox2" /><text>选项二</text>
</label>
</checkbox-group>
</view>
<view class="uni-form-item uni-column">
<view class="title">slider</view>
<slider value="50" name="slider" show-value></slider>
</view>
<view class="uni-form-item uni-column">
<view class="title">input</view>
<input class="uni-input" name="input" placeholder="这是一个输入框" />
</view>
<view class="uni-btn-v">
<button form-type="submit">Submit</button>
<button type="default" form-type="reset">Reset</button>
</view>
</form>
</view>
</view>
</template>
```
### Example (Example 3)
```vue
<script>
export default {
data() {
return {
}
},
methods: {
formSubmit: function(e) {
console.log('form发生了submit事件，携带数据为：' + JSON.stringify(e.detail.value))
var formdata = e.detail.value
uni.showModal({
content: '表单数据内容：' + JSON.stringify(formdata),
showCancel: false
});
},
formReset: function(e) {
console.log('清空数据')
}
}
}
</script>
```
### Example (Example 4)
```vue
<style>
.uni-form-item .title {
padding: 20rpx 0;
}
</style>
```
### Example (Example 5)
```vue
<!-- /pages/index/index.vue -->
<template>
<view class="content">
<form @submit="onSubmit">
<compInput name="test" v-model="testValue"></compInput>
<button form-type="submit">Submit</button>
</form>
</view>
</template>
<script>
export default {
data() {
return {
testValue: 'Hello'
}
},
methods: {
onSubmit(e) {
console.log(e)
}
}
}
</script>
```
### Example (Example 6)
```html
<!-- /pages/index/index.vue -->
<template>
<view class="content">
<form @submit="onSubmit">
<compInput name="test" v-model="testValue"></compInput>
<button form-type="submit">Submit</button>
</form>
</view>
</template>
<script>
export default {
data() {
return {
testValue: 'Hello'
}
},
methods: {
onSubmit(e) {
console.log(e)
}
}
}
</script>
```
Reference: [Official Documentation](https://doc.dcloud.net.cn/uni-app-x/component/form.html)